Explanation of data types in this archive for "High sensitivity moment magnetometry with the quantum diamond microscope"

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Folder artificial_ferromagnetic_spherules

These are raw data files for the measurements done on the artificial ferromagnetic spherules as conducted by both the QDM and SQUID microscope. 

CIT_format_demag_seq contains the AF demagnetization sequences of a 1 T IRM.  These files are in the commonly used CIT format and can be viewed using the freely available Paleomag software:

http://cires1.colorado.edu/people/jones.craig/PMag3.html

The QDM folder contains data from: 

- The two AF demagnetization sequences of the 1 T IRM (/demag_sequence_1 and /demag_sequence_2)
- Measurements of an inclined and in-plane 1 T IRM at zero and larger liftoffs (/liftoff_tests)
- Tests of binning and upward continuation on the recovered dipole moment (/upward_continuation_tests and /binning_tests)

These the results of the liftoff, binning, and upward continuation tests are tabulated in Table 2 of the paper.  The cropping tests are not included here as they can be reproduced by cropping the 4x4 binned map included. 

Each folder contains data in the form of a B111 (except for the upward continuation tests which are based off of a single Bz map) and a Bz file in Matlab data format (.mat).  These contain a data matrix with the B111 or Bz intensity values and (for Bz files) a raster of the optical light image and information about the pixel size and half-thickness of the NV layer (5 µm in all maps).  The B111 maps also contain a map of induced magnetic field signals (variable B111para), a map of where the ODMR spectrum converged (FitCvgBoth), a raster of the optical light image (ledImg) and the separate maps of B111 with the two Helmholtz coil polarities (see text and Glenn et al. 2017).  The B111 maps are in units of gauss while the Bz maps are in tesla.  Finally, there is a .png image for each Bz map.  

The SQUID_microscope folder contains data from the AF demagnetization of the 1 T IRM as measured on the SQUID microscope.  Each data file (.mat) contains a map of Bz, B_total (magnitude of B), a nominal approximate liftoff, and step (i.e., pixel) size. 

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Folder meteorite_data

This folder contains the Bz data file (see above for content) and a .png image file of NRM of 4 fields of view from the Martian meteorite ALH 84001 and 4 fields of view of sulfide inclusions from the GRA 95229 CR chondrite. 

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Folder synthetic_maps

This folder contains the synthetic maps generated with dipolar and complex sources with and without noise (see Table 1 in paper). 

For each map, the .mat format data file contains a matrix of Bz values, a liftoff (distance between top of the source-containing region and the mapping plane), a pixel size, and the true net moment of the source (variable vtotal), which is given in coordinates with the map in the x-y plane and z oriented out of the page. 

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Folder QDM_noise_sample

This contains a source-free QDM map used to add realistic QDM noise to the synthetic maps in the CPLX5SNR5 dataset.  The content of the data files are as described above.  

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Dataverse_code

This folder contains codes used in map processing and dipole inversions.  See ReadMe file within folder. 